$Gamma: Difference between revisions

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<span class="pageSubtitle">Gamma function</span>
<span class="pageSubtitle">Gamma function</span>
<p class="warning">Most Sirius $functions have been deprecated in favor of Object Oriented
<p class="warning">Most Sirius $functions have been deprecated in favor of Object Oriented
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The <var>$Gamma</var> function returns the value:
The <var>$Gamma</var> function returns the value:
:hp0 font=chapn.
 
<ul>
<sub>0</sub>&int;<sup>&infin;</sup> u<sup>x-1</sup> e<sup>-u</sup> du
<li> &'sub(&infin.)
<br>
&'sub(0)&int.  u&'sup( x-1) e&'sup( - u) du
</ul>
:ehp0.


==Syntax==
==Syntax==

Revision as of 18:41, 6 January 2012

Gamma function

Most Sirius $functions have been deprecated in favor of Object Oriented methods. There is currently no direct OO equivalent for the $Gamma function.

The $Gamma function returns the value:

0 ux-1 e-u du

Syntax

%num = $Gamma(x)

If x is not within the range 0 < x < 57.5744, an error message is printed and a 0 is returned.

See the SIRFUNC EXEC parameter for an explanation of when this high-performance, high-precision version of the IBM mathematical function from the Sirius Mods is used, as opposed to the version of the $function in the Model 204 FUND or FUNDLE CSECT.